body, html, h1, h2, h3, h4, h5, h6, ul, ol, li, dl, dt, dd, header, menu, section, p, input, td, th, ins {
  padding: 0;
  margin: 0;
}
body{
  font-size: 12px;
  color: #333;
  font-family: Arial, Helvetica, sans-serif
}
div{
  box-sizing: border-box;
}
ul li{
  list-style: none;
}
a{
  text-decoration: none;
}
button{
  outline: none;
}